[c-nsp] Nexus 7000 fiber 1GBit linecard.

[Lincoln Dale]

Marian Ďurkovič wrote:
> On Mon, Dec 01, 2008 at 02:53:41PM -0300, Juan Angel Menendez wrote:
>   
>>         It's already here:  N7K-M148GS-11 Nexus 
>> 7000 Series 48-Port Gigabit Ethernet Module (SFP) with 40 Gbps Fabric
>>
>>         http://www.cisco.com/en/US/prod/collateral/switches/ps9441/ps9402/ps9512/Data_Sheet_C78-437763.html
>>     
>
> Hmm, this datasheet shows Time Domain Reflectometry support on 48-port
> copper module, but no Digital Optical Monitoring support on fiber module.
> So again, fiber connections have less layer-1 monitoring capabilities than
> the copper ones...
>   
DOM on the 48-port Fiber is there.  (provided the SFP modules support 
it, which all of the listed ones there do).

its output is identical to that of the 32x10G module in terms of DOM 
capabilities:

ltd-n7010-1# show module 2 | grep -i module
Mod  Ports  Module-Type                      Model              Status
2    32     10 Gbps Ethernet Module          N7K-M132XP-12      ok

ltd-n7010-1# show int eth2/1 transceiver details
Ethernet2/1
    sfp is present
    name is CISCO-EXCELIGHT
    part number is SPP5101SR-C1   
    revision is A  
    serial number is ECL121302KT    
    nominal bitrate is 10300 MBits/sec
    Link length supported for 50/125um fiber is 82 m(s)
    Link length supported for 62.5/125um fiber is 26 m(s)
    cisco id is --
    cisco extended id number is 4

    SFP Detail Diagnostics Information
  
----------------------------------------------------------------------------
                                     Alarms                  Warnings
                                High        Low         High          Low
  
----------------------------------------------------------------------------
  Temperature   28.65 C        75.00 C     -5.00 C     70.00 C        0.00 C
  Voltage        3.28 V         3.63 V      2.97 V      3.46 V        3.13 V
  Current        4.90 mA       10.50 mA     2.00 mA    10.50 mA       
2.00 mA
  Tx Power       -3.18 dBm       1.49 dBm  -11.30 dBm   -1.50 dBm     
-7.30 dBm
  Rx Power       -9.28 dBm       1.99 dBm  -13.97 dBm   -1.00 dBm     
-9.91 dBm
  Transmit Fault Count = 0
  
----------------------------------------------------------------------------
  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

> Is this just a temporary limitation of the initial NX-OS release, 
> or do these SFP cards suffer from the same problems as the 6748-SFP
> cards for Cat6500 where DOM still doesn't work?
>   

the hardware was designed with DOM in mind from day one.



cheers,

lincoln.